KatyPerryFragrances.comHas Katy Perry been naughty or nice this year? You can find out by watching a new commercial for her latest fragrance, Killer Queen.

In the spot, Santa is sitting on a throne, and Katy -- wearing a sexy red dress, black stockings, boots and a fur collar around her neck -- runs up and sits on his lap. "What would you like Santa to bring you this Christmas?" asks jolly old St. Nick. "Well, I always thought it'd be really fun to have a picnic on the top of Machu Picchu," Katy replies, referring to a mountain in Peru that's said to be the Lost City of the Incas. In real life, Katy has stated that climbing that mountain is on her bucket list.

"Have you been naughty or nice?" asks Santa. "What do YOU think?" purrs Katy. Then, they both laugh, "Ho ho ho!"

In other Katy news, she's asking her fans to "SHOW ME YOUR LIGHT!" She's inviting fans to post on Instagram a photo of what "unconditional love" means to them, as well as a story, in honor of her new single, "Unconditionally." She wants you to tag it #katyunconditionally, and also add your location, to illuminate a special virtual "prism." "PRISM is all about letting the light in," Katy writes, referring to her new album.

Once you make your submissions, you can go to Prismlights.KatyPerry.com and see "your" light. The goal, apparently, is to virtually illuminate the entire world.